[llvm] [Scalarizer] Fix to only scalarize if intrinsic was marked as isTriviallyScalarizable (PR #113625)

[Jay Foad via llvm-commits]

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@@ -1084,6 +1084,17 @@ bool ScalarizerVisitor::visitExtractValueInst(ExtractValueInst &EVI) {
   ValueVector Res;
   if (!isStructOfMatchingFixedVectors(OpTy))
     return false;
+  if (CallInst *CI = dyn_cast<CallInst>(Op)) {
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jayfoad wrote:

Can you just handle `IntrinsicInst` here, instead of manually checking for a known callee and looking up the id?

https://github.com/llvm/llvm-project/pull/113625